csr ™cemintel · that a vapour permeable foil be used, such as csr bradford ... order nº item...

scarborough™ WEaThErboarD

AUGUST 2012exTernAl clAddinG SySTemS

cSr ceminTel™

Fc:966

Cemintel Scarborough™ Weatherboards are strong, durable fibre cement products for residential cladding. Designed to provide depth, they are resistant to fire and termites and are immune to permanent water damage. For use on new and existing buildings, Cemintel Scarborough™ Weatherboards are a low maintenance cladding system.

conTenTSDeSCription 2

FeatureS 2

appliCationS 2

Material SpeCiFiCationS 2

DeSign ConSiDerationS 3-4

HanDling anD Cutting 5

preparation 6

DeCoration & MaintenanCe 6

CoMponentS 7

inStallation 8-15

HealtH & SaFety 16

ManuFaCtureD For liFe 16

ContaCt DetailS 16

deScripTionCemintel Scarborough™ Weatherboards are autoclaved, cellulose fibre reinforced, cement weatherboards designed for residential cladding. They will not rot or warp when correctly installed and maintained, and are resistant to fire and termite damage.

Cemintel Scarborough™ is a smooth faced weatherboard machined from 12mm thick baseboard. It is fixed in the traditional step pattern and has a nail fixing groove covered by a 25mm lap.

Cemintel Scarborough™ Weatherboards are supplied primed and, once installed, can be coated with an exterior grade paint system to provide a durable, low maintenance finish.

FeATUreS• Strongshadowlineandsimplefixingsystem. • Immunetopermanentwaterdamage. • Fireresistant. • Termiteresistant. • Suitedtogunandhandnailing. • Providesatough,durablecladdingsystem.

ApplicATionSCemintel Scarborough™ Weatherboards are suited to many residential external cladding applications including:

• Upperandlowerstoreyadditions • Compositeconstruction • Over-claddingofexistingwalls • Gableends • Infillpanels • Featurepanels

Scarborough™ Weatherboards may be fixed to timber or steel framing.ForbuildingsandwindloadsinaccordancewithAS4055, the products are suitable for wind zones N1 to N5/C3.

mATeriAl SpeciFicATionSCemintel Weatherboard products conform to the requirements of AS/NZS2908.2 ‘Cellulose-cement products Par t 2: Flatsheets.’

Cemintel Scarborough™ Weatherboards are factory coated with a pale yellow primer.

Fire resistanceWhentestedinaccordancewithAS1530.3,theFireHazardIndices for Cemintel Scarborough™ Weatherboard are as follows:

Fire Hazard indices

2 ceminTel ScArboroUGh™ weATherboArd

table 1: cemintel scarborough™ Weatherboard

Thickness (mm)

Width (mm)

Length (m)

Unitmass (kg/m)

Areamass (kg/m2)

12 175 4.2 2.74 15.7

Product EFHI SMOGRArc GroupNumber

Cemintel Scarborough™ Weatherboard 0/0/0/0 0 1

notes: eFHi = early Fire Hazard indices (ignitability/Spread of Flame/Heat evolved/Smoke Developed). SMograrc = Smoke growth rate index.

deSiGn conSiderATionSThis guide represents good practice, though it is not intended as an exhaustive statement of al l relevant information. It remains the responsibility of the building designer to verify that Cemintel Scarborough™ Weatherboards are suitable for the particular requirements of any given project.

FraMinGCemintel Scarborough™ Weatherboards may be fixed to either timber or steel framing. Stud spacing shall be in accordance with Table 2 or 3.

TimberframingmustcomplywithAS1684‘ResidentialTimberFramingConstruction’.Timberwithanequilibriummoisturecontentoflessthan16%atthetimeofcladdingapplicationmustbeused.Unseasonedtimberpronetoshrinkagemustnot be used. Inspect the frame carefully for bowed, warped, or twisted studs; and for alignment of all framing members. Timbers that are not flush should be packed out or straightened.

MetalframingmustcomplywithAS3623‘DomesticMetalFraming’,andhaveaBMTof lessthan1.6mm.Donotfixweatherboards to thicker cold rolled members or to hot rolled steel. Vertical timber or metal battens may be used over these members. Refer to f raming manufacturer fo r app rop r i a te p roduc ts to su i t coas ta l o r o the r corrosive locations.

Wind LOadinGCemintel Scarborough™ Weatherboards are suitable for the specified wind classifications when installed to frames with maximum stud spacings as shown in Table 2 and 3.

Water resistanceWind forces can produce lower air pressures within buildings than on the outside, forcing water through gaps in the building envelope such as at penetrations and joints, even at low wind speeds.Asarkingorwallwrapishighlyrecommendedbetweenstud frames and Cemintel Scarborough™Weatherboards(CSRBradfordEnviroseal™WallBreatherisrecommended).SarkingmustbedesignedandinstalledinaccordancewithAS/NZS4200Part1:Materials,andPart2:Installation,andshouldbesealed as for a vapour barrier.

The control of water ingress to a building is the responsibility of thedesigner.Allflashings,dampproofcoursesandsealantsmust be installed in accordance with the relevant standards and building codes.

Condensation is a complex problem, and can occur under a variety of conditions, not just cold weather. Literature on this subjectisavailablefromCSIRO/BRANZ/ASHRAEandshouldbe consulted when building in areas where condensation is likely to occur. In these cases, the appropriate use of a sarking as a vapour barrier or as thermal insulation, or both, can be effective in controlling condensation.

table 2: Maximum stud spacing (mm) for timber Framing

notes: Corner Zones are areas within 1200mm of a building corner. Framing is seasoned timber.

Cemintel™ Product FixingLocation

Wind Category

N1 N2 N3/C1 N4/C2 N5/C3

Scarborough™ Weatherboard

GeneralZone 600 600 600 450 NA

CornerZone 600 600 450 300 NA

table 3: Maximum stud spacing (mm) for steel Framing

notes: Corner Zones are areas within 1200mm of a building corner. Steel framing is 0.55 to 1.6mm BMt.

Cemintel™ Product FixingLocation

Wind Category

N1 N2 N3/C1 N4/C2 N5/C3


GeneralZone 600 600 600 600 450

CornerZone 600 600 600 400 300

ceminTel ScArboroUGh™ weATherboArd 3

Cemintel™Weatherboard/PlankSystem

•Cemintel™WeatherboardsorPlanks.

•BradfordEnviroseal™WallBreather.

•TimberorSteelStuds(90mm)at600mmmaximumcentres.

•Insulationaspertablebelow.

•1layerx10mmGYPROCKPlasterboardCDtotheinsideofframing.

Insulation Materials Total Wall R-Value

(a) Nil 0.8

(b)BradfordComfortSeal™R1.5. 1.7

(c)BradfordSoundscreen™R2.5. 2.6

tHerMaL insULatiOnInsulation materials should be installed to enhance thermal insulation properties and occupant comfort. Insulation also improves the acoustic performance of the wall against outside noise.

Where occupant comfort is a consideration, the minimum recommendation is a reflective foil fixed to the outside of the frame, directly beneath the weatherboards. It is important thatavapourpermeablefoilbeused,suchasCSRBradfordEnviroseal™WallBreather.

Where greater thermal insulation properties are required, it is recommendedthatCSRBradfordwallbattsbeinstalledinthewall framing. Check with local building regulations for minimum insulation requirements.

The level of insulation provided in a wall is determined by its R-value.ThehighertheR-valuethegreatertheinsulationprovided. See table below.

cOLd cLiMatesIn cold climates where condensation in the wall cavity is possible, a vapour barrier is also recommended between any internal linings and the framing.

Cemintel Scarborough™ Weatherboards are not designed to beincontactwithsnoworicebuild-upforextendedperiods,such as is experienced in alpine areas subject to snowdrifts. TheyareNOTtobeusedinfreeze/thawconditions.

When metal framing is used in extreme climates and clad with Cemintel Scarborough™ Weatherboards, additional precautions apply. Contact Cemintel™ for more details. Extreme climatic conditions include mountain and desert climates.

cOastaL areasCemintel Scarborough™ Weatherboards are suitable for use in coastal areas, which are defined as being within, 1km of a beachwithbreakingsurf,orwithin200mfromanon-surfbeachshoreline. Consideration must also be given to local weather and topographical features which can increase the distance that salt spray can travel.

To resist corrosion in these areas, salt laden air must be excluded from the wall cavity, for instance by lapping and sealing vapour barrier and flashing at corners, penetrations and joins. Salt laden air must also be excluded from entering the rest of the building envelope, such as the roof, etc.

Allwallsmustbesufficientlyexposedfromabovesothatraincanperform natural wash down of the wall. Walls that are protected by soffits above must be washed down twice per year, to remove saltbuild-up.Ensurefastenershavemanufacturersapprovalforuse in the application.

Priortotheapplicationoftheexternalcoating,washdownwallswithcleanfreshwatertoremovesaltspraybuild-upfromsheetsand fixings. Sheets must be allowed to dry before coating.

BracinGCemintel Scarborough™ Weatherboards are not designed to act

as structural bracing.


terMite PrOtectiOnThere is a wide variety of methods for managing termite entry to buildings, and selecting the appropriate method for any structure depends on specific risk factors and the form of construction. Measures for termite management have not been addressed in this guide.

Refer toyour localpestmanagementservice, theBCA,AS3660,oryourlocalbuildingauthoritiesformoreinformationabout the requirements for the design of a suitable termite management system.

hAndlinG And cUTTlinGCemintel Scarborough™ Weatherboards must be stacked flat, off the ground, and supported on a level platform. Care must be taken to avoid damage to edges, ends and surfaces.

Material must be kept dry, preferably by being stored inside a building. Where it is necessary to store material outside, it must be protected from the weather.

The following methods may be used for cutting Cemintel

Scarborough™ Weatherboards.

POWer saWForbestresults,useacircularsawwithanappropriateblade.CSRrecommendsusingtheHitachiFibreCementPowerSawBlade.Thisbladeisspecificallydesignedforusewithf ibre cement and produces a superior cut compared to conventional blades.

It is ideal forusewiththeHitachiC7YAdustlesscircularsawandother185mmcircularsawsf ittedwithvacuumextraction systems.


HitachiC7YADustlessCircularSawwithDustExtraction System.

HitachiFibreCementPowerSawBlade.

compound Mitre saw.Dustreducingsawsusedwithfibrecement saw blades. Supplied by others.

Hitachi: C10FCE2 C12LSH

Makita: LSO714 LS1013 LS1212

Description OrderNº

PowerSaw 10836

PowerSawBlade185mm 10837

DustExtractor 10833

prepArATionThe number of weatherboards required for a wall can be calculated using the coverage table and the length of the wall.

Priortofixingweatherboards,thefollowingproceduresshouldbe completed:

• FixAluminiumExtrusionsortimbermouldingsatinternalandexternal corners, they should be fastened to the frame prior to fixing weatherboards.

• Wallopenings,verticaljoints,sills,headsandcornersshouldbe weatherproofed with flashing.

• Aluminiumwindowtrimsshouldbefixedtoaluminumwindow and door frames.

• Createahorizontaldatumlineandplacetemporarynailstosupport the first weatherboard.

• Toensurethefirstrowofboardsareatthecorrectangle,thePVCstarterstriporpackershouldbefixedtothebottomplate.(SeeFIG1)

decorATion & mAinTenAnceCemintel Scarborough™ Weatherboards should be coated with two coats of exterior grade acrylic paint.

The surface must be clean and dry before application. In all cases,thepaintmanufacturer’sinstructionsaretobefollowed.

The durability of the weatherboard system can be improved by periodic inspection and maintenance. Inspections should include examination of the paint, flashings and seals.

Paintfinishesmustbemaintainedinaccordancewiththemanufacturer’srecommendations.Anycrackedordamagedflashings or seals that would allow water ingress must be repairedimmediately.Anydamagedweatherboardsmustbe replaced.

The durabil ity of the system can also be increased by paintingallexposedsealantstothesealantmanufacturer’srecommendations.



UnitWidth 175

Overlap 25

NumberofRows WallHeight

1 175

2 325

3 475

4 625

5 775

6 925

7 1075

8 1225

9 1375

10 1525

15 2275

20 3025

table 4 : coverage calculator

BUtt jOintsOff-stud joiner (soaker)

• UsedtojoinScarborough™ Weatherboardsoff-stud, in conjunction with Sikaflex 11FCAdhesive.

OrderNº Item

89857 Soaker

39378 Sikaflex11FC350mltube(Grey)

starter striP• PVCstarterstripforaligningthefirst

Scarborough™ Weatherboard.

OrderNº Length

89098 3000mm

externaL cOrner extrUsiOn• Aluminiumaccessoreywith

chromate finish.

OrderNº Length

89096 3000mm

internaL cOrner extrUsiOn• Aluminiumaccessorywith

chromate finish.

OrderNº Length

89095 3000mm

WindOW triM• Aluminiumaccessorywith

chromate finish.

OrderNº Length

89097 3700mm

FLexiBLe seaLant• SikaflexPRO™2HPpolyurethanesealantforfillinggaps

around windows, doors and other penetrations.

OrderNº Item

11378 310mlTube(Grey)

39488 310mlTube(Black)

scarBOrOUGH™ WeatHerBOards

CodeNº Thickness (mm)

Width (mm)

Length (m)

Weight (kg)

89474 12 175 4.2 11.5

FastenersFibre cement nails:

• Hotdipgalvanised2.8x40mmforsoftwoodandhardwoodframes. Not suitable for use in coastal areas.

OrderNº Qty

77258 2kg

• Hot-dipgalvanised2.8mmx50mmforfixingoverexistingcladding up to 10mm thick. Not suitable for use in coastal areas.

OrderNº Qty

77259 2kg

• StainlessSteel2.8x40mmforsoftwoodandhardwoodframes.Foruseinhighcorrosionzonesincludingcoastalareas.Referto‘DesignConsiderations’.

• Bulletheadgalvanisednail3.15x60mmgal. (Supplied by others)

Gun nailing:

Usedforconcealedfixingtotimberframes.Ensurenailsmeetdurability requirements. Minimum nail requirements: length 40mm and diameter 2.5mm.

Fibre cement screws for steel framing:

• BuildexFibreZIPS™,9–18x30mmClass3finish.Forsteelframingof0.55to1.6mm.

OrderNº Qty

13165 1000

notes: in high corrosion zones, such as the coastal marine environment, Class 4 screws must be used.

componenTS


inSTAllATionScarborough™WeatherboardsareinstalledusingaPVCstarterstrip or packing strip. Starter strip is installed horizontally and fixedtoframeat600mmmaximumcentres.Boardsshouldbefixed to steel or timber framing using the appropriate fasteners.

Beginfixingfirstweatherboardatanexternalcorner,ensuringtheboardisflushwiththecornermouldingorextrusion.Positionthe board over the starter strip and fix the top to each stud in the nailinggroove.Alternatively,resttheboardondatumlinenails,and fasten the bottom edge to each stud, through a packing strip.Fastenthetoptoeachstud,inthenailinggroove.RefertoFIG1,2,3and4.

Fixthefirstrowofweatherboardsaroundtheperimeterofthebuilding,cuttingtolengthasappropriateforon-studoroff-studjointing.Oncethefirstrowiscompleteremovetheguidenails.

Beginthesecondrowwithanoff-cuttoensurethatthejointsarestaggered along the wall. Lap boards to a minimum of 25mm. Fixthetopofeachboardinthenailinggroovetoeverystud.Check rows for level.

Fastenersshouldbe located inthenailinggroove20mmminimumfromends.Pre-drillholesforfixingsatboardendstoavoid corner damage while installing.

Continue fixing successive weatherboards working up the wall.

jOintsPlanvertical layoutso that,wherepossible,a fullwidthweatherboard occurs above and/or below openings. If a weatherboard has been reduced in width, provide a joint to at leastonesideoftheopening.RefertoFIG7.

Whenawindowordooropeningexceeds1800mmwidth,itisnecessary to have a joint above and below the opening for both full and reduced width weatherboards, to allow for movement. Joints at ends of weatherboards should be located randomly throughout the wall to reduce visual impact.

Weatherboard ends should be cut square and sanded smooth in preparation for butt joints. Joints formed on a stud may require additional framing to allow sufficient edge distances for fixings. ReferFIG8.

Cemintel Scarborough™ Weatherboards may also be installed with joints located between studs, utilizing the metal soaker. ReferFIG9.

cOrner detaiLInternal and external corners can be finished by butting boards totimbermouldings.Aluminiumextrusionsforinternalsandexternals are also available.

Aluminiumcornerextrusionsortimbermouldingsmustbeinstalledpriortothefixingofboards.Boardendsmustbe

straight and square, and are to be butted up firmly to the moulding.Fastenersshouldbe20mmminimumfromboardendsandholesmustbepre-drilledwherecloserthan50mmfromboardends.RefertoFIGS10-15.

ForAluminiumcornerextrusions,fixbothlegsoftheinnerpartat400mm centres to corner studs before installing weatherboards.

Angleflashingmustbeusedatallinternalandexternalcornerswhere sarking is not used or where additional weatherproofing is required.

WindOWsScarborough™ Weatherboards (lap projection of 27mm) are generally too thick to fit into the external flange of most residential aluminum window suites.

Analuminiumwindowtrimaccessoryisavailabletobefittedto the window perimeter prior to fitting the weatherboards. The trim covers the ends of boards that butt to the window frame providing a neat finish. The window trim should be screwed to thewindowreveal.ReferFIGS16and17.

Alternatively,thewindowcanbe“trimmed”withatimbermoulding,suchas,primedLOSP.Thetimbermouldingisfittedto the window perimeter first, and Scarborough™ Weatherboards butted to the moulding. This provides a flush detail without unsightlyspiderholes.Doublestudattheopeningarerequired.ReferFIGS18and19.

These trim options are also suited to other openings for hinged, sliding and garage doors.

AllopeningsshouldbesuitablyflashedpriortothefixingofScarborough™ Weatherboards.

naiL FixinGScarborough™ Weatherboards are intended to have a concealed fixing system. This is achieved via fixing the board only in the top facegroove.ReferFIG1and2.

Boardsmaybefixedviaeitherhandnailingornailgun.Forgunnailing use nails of 40mm minimum length and 2.5mm minimum diameter. Ensure nails meet the durability requirements.

Where framing irregularities cause a gap between boards at the lap, additional face nailing with a bullet head nail may be a useful optionforaffectedareas.ReferFIG6.



FiG 3: nail driving detail

FiG 2: screw Fixing with timber Packing stripFiG 1: Base detail with PVc starter strip

FiG 4: installation start-up detail


FiG 5: Weatherboard set-out FiG 6: Optional Lap Fixing

FiG 7: Window Openings


FiG 8: On-stud jointing FiG 9: Off-stud jointing

FiG 10: external corner with timber Moulding FiG 11: internal corner with timber Moulding


FiG 12: external corner with aluminium corner extrusion

FiG 13: external corner with aluminium corner extrusion


FiG 14: internal corner with aluminium corner extrusion

FiG 15: internal corner with aluminium corner extrusion


FiG 16: aluminium Window trim Head/sill detail

FiG 17: aluminium Window trim jamb detail


FiG 19: timber Window trim jamb detail

FiG 18: timber Window trim Head/sill detail

www.cemintel.com.au

Fc:966

auGuSt 2012contact DetailS

Cem

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ark

of C

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Lim

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CSR Cemintel™ Sales Support Tel: 13 17 44 Fax: 1800 646 364

CSR designLINK® Technical Support Service Tel: 1800 621 117

New South Wales and ACT 376 Victoria Street, Wetherill Park NSW 2164

Queensland 768 Boundary Road, Coopers Plains QLD 4108

Victoria 277 Whitehall Street, Yarraville VIC 3013

South Australia Lot 100 Sharp Court, Mawson Lakes SA 5095

Western Australia 19 Sheffield Road, Welshpool WA 6106

Tasmania PO Box 61, Glenorchy TAS 7010

Northern Territory Cnr Stuart Hwy & Angliss St, Berrimah NT 0828

cSR cemintel™, cSR builDinG pRoDuctS limiteD, a.b.n. 55 008 631 356

HealtH & Safety WaRNINGFibre Cement products contain crystalline silica. Repeated inhalation of fibre cement dust may cause lung scarring (silicosis) or cancer. Do not breathe the dust. When cutting sheets, use the methods recommended in this brochure to minimise dust generation. If power tools are used, wear an approved dust mask (respirator). These precautions are not necessary when stacking, unloading or handling fibre cement products.

For further information and for a Material Safety Data Sheet, phone 1800 678 068.

CemINtel – maNufaCtuRed foR lIfeCSR Building Products Limited (“CSR”) warrants its, Scarborough™ Weatherboard (“Product”) to remain free of defects in material and manufacture for the usual lifetime of the Product (up to 25 years).

In the event of any failure of the Product caused by the direct result of a defect in the material or manufacture of the Product, CSR will at its option replace or repair, supply an equivalent product, or pay for doing one of these.

This warranty does not apply where the Product has been used in any manner not in accordance with the manufacturer’s instructions, nor the reuse of the Product after its initial installation. This includes installation and maintenance in accordance with this technical manual. CSR recommends that only those products, components and systems recommended by it be used and the project must be designed and constructed in strict compliance with all relevant provisions of the current Building Code of Australia, regulations and standards. All other products, including coating systems, applied to or used in conjunction with the Product must be applied or installed and maintained in accordance with the relevant manufacturer’s instructions and good trade practice. CSR will need to be satisfied that any defect in its Product is attributable to material or manufacture defect (and not another cause) before this warranty applies.

Notification of a warranty claim must be made to CSR prior to any return or attempted repair of the Product. Failure to allow CSR to examine an alleged faulty Product in situ may result in the voiding of this warranty.

CSR will not be liable for any claims, defects or damages arising from or in any way attributable to poor design or detailing, poor workmanship, movement of materials to which the Product is attached and/or, incorrect design of the structure settlement or structural movement, high levels of pollution, acts of God including, but not limited to, floods, cyclones, earthquakes or other severe weather or unusual climatic conditions, performance of paint/coatings applied to the Product or normal wear and tear.

Other than as expressly set out in this warranty, and the guarantees that can not be excluded under The Australian Consumer Law (Schedule 2 of the Competition and Consumer Act 2010 (Cth)) (and any other law), CSR excludes all other warranties and guarantees with regard to the Product including all guarantees and warranties that may apply at law.

To the extent that it is able to do so, CSR excludes all liability for loss and damage (including consequential loss) in connection with the Product. This exclusion does not apply where the Product is sold to a consumer and is a good of a kind ordinarily acquired for personal, domestic or household use or consumption.

The following statement is provided where the Product is supplied to a buyer who is a “consumer” under the Australian Consumer Law: Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and for compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure. The benefits of this warranty are in addition to other rights or remedies of the consumer under law in relation to the goods or services to which the warranty relates.

Notification of a warranty claim must be made to CSR prior to any return of the Product.

To make a claim under this warranty, you must contact CSR on 1300 CEMINTEL , o r wr i te to one of our s tate of f ices, www.cemintel.com.au/contact-us. All expense of claiming the warranty will be borne by the person making the claim. CSR may require documentation supporting the claim to be provided.

ScaRboRouGh™ weatheRboaRD

csr ™cemintel · that a vapour permeable foil be used, such as csr bradford ... order nº item...

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